EP 2749530 A4 20150527 - CALCIUM CARBIDE GRANULES, PROCESS FOR PRODUCING CALCIUM CARBIDE GRANULES, AND SYSTEM FOR PRODUCING CALCIUM CARBIDE GRANULES
Title (en)
CALCIUM CARBIDE GRANULES, PROCESS FOR PRODUCING CALCIUM CARBIDE GRANULES, AND SYSTEM FOR PRODUCING CALCIUM CARBIDE GRANULES
Title (de)
CALCIUMCARBIDGRANULAT, VERFAHREN ZUR HERSTELLUNG DES CALCIUMCARBIDGRANULATS UND SYSTEM ZUR ERZEUGUNG DES CALCIUMCARBIDGRANULATS
Title (fr)
GRANULÉS DE CARBURE DE CALCIUM, LEUR PROCÉDÉ DE PRODUCTION, ET SYSTÈME DE PRODUCTION DE GRANULÉS DE CARBURE DE CALCIUM
Publication
Application
Priority
- JP 2011183661 A 20110825
- JP 2012052716 W 20120207
Abstract (en)
[origin: EP2749530A1] Provided is a process for producing calcium carbide granules which, when used for dry-process acetylene generation, neither enhance side reactions such as acetylene polymerization, nor adversely affect the yield, nor enhance the risk to safety due to an increase in reaction temperature. The process is for producing calcium carbide granules in which the content of granules having a diameter of 4 mm or larger is 5 wt.% or less and the content of granules having a diameter of 0.15 mm or smaller is 20 wt.% or less, the process comprising the step (A) of crushing calcium carbide with a crusher, the step (B) of putting the calcium carbide which has been crushed with the crusher through a screen having an opening size of 4 mm, and the step (C) of introducing the calcium carbide remaining on the screen into the crusher again. The steps (A) to (C) are conducted in an inert gas atmosphere. The size of crushed granules to be obtained by the crusher is controlled so that the amount of the calcium carbide introduced into the crusher in the step (A), a, and the amount of the calcium carbide passing through the screen in the step (B), b, satisfy 1‰¤(a-b)/b‰¤2.5.
IPC 8 full level
C01B 32/942 (2017.01); B01J 2/20 (2006.01)
CPC (source: EP)
C01B 32/942 (2017.07)
Citation (search report)
- [XYI] DE 2037758 A1 19720203 - KNAPSACK AG
- [Y] FR 2856611 A1 20041231 - HEURGUE CONSEIL S A [FR]
- [Y] FR 2482578 A1 19811120 - HOECHST AG [DE]
- [YD] JP 2004082045 A 20040318 - KAWASAKI HEAVY IND LTD
- [XY] "Calcium Carbide Detailed Project Report Corporate Office", 9 December 2010 (2010-12-09), XP055181678, Retrieved from the Internet <URL:http://www.ascconline.com/img/services/project_report/Calcium_Carbide_Project_Report_Sample.pdf> [retrieved on 20150408]
- See references of WO 2013027426A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 2749530 A1 20140702; EP 2749530 A4 20150527; EP 2749530 B1 20180124; CN 103764559 A 20140430; CN 103764559 B 20160413; IN 516MUN2014 A 20150619; JP 5909493 B2 20160426; JP WO2013027426 A1 20150305; WO 2013027426 A1 20130228
DOCDB simple family (application)
EP 12826254 A 20120207; CN 201280041501 A 20120207; IN 516MUN2014 A 20140324; JP 2012052716 W 20120207; JP 2013529909 A 20120207